The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 2001
Filed:
Jun. 04, 1999
Constance Chang-Hasnain, Union City, CA (US);
Marc Schwager, Los Altos, CA (US);
Rang-Chen Yu, San Jose, CA (US);
Bandwidth9, Fremont, CA (US);
Abstract
A multiplexer has an optical circulator including at least first, second and third circulator ports. An optical fiber with a first optical transmission path is coupled to the first circulator port of the optical circulator. The optical fiber carries a wavelength division multiplexed optical signal, including signals &lgr;,-&lgr;,, and at least one signal &lgr;,to be dropped by the multiplexer. A second optical transmission path is in optical communication with the second circulator port. A first filter is coupled to the second optical transmission path. The first filter passes a portion of the &lgr;,signal, and reflects a first residual &lgr;,signal and signals &lgr;,-&lgr;,to the optical circulator. A third optical transmission path is in optical communication with the third circulator port and transmits the signals &lgr;,-&lgr;,received from the optical circulator.